Like John says would have to be inside. 737 cruise rates between 700-800 kph, with an operational ceiling of some 35 000 ft.
Anyone who's ever riden a motor bike will tell you, sit up from behind the screen at 200kph + and you'll struggle not to get ripped off the bike. So times that by 4, with nothing to hold onto and drop the temp to -50 and see how you go
